How to count word occurrences and frequency using maps in Go.
Learn how to create reusable HTTP middleware in Go by wrapping http.HandlerFunc.
Learn how to implement custom MarshalJSON and UnmarshalJSON methods for complex types in Go.
How to create deep copies of structs with nested fields in Go.
Understanding the differences between make() and new() functions in Go and when to use each.
Learn how to extract substrings from strings in Go using slice syntax and rune conversion for Unicode-safe operations.
Learn the fan-out fan-in pattern for distributing work to multiple goroutines and collecting results.
Learn how to filter slice elements in Go based on a condition, collecting only the matching elements.
Learn how to find the index of an element in a Go slice using loops and the slices.Index function from Go 1.21+.
Learn how to get file size and modification time information in Go using os.Stat and FileInfo.